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Specialized - Switching Tube ·SparkGapPulseSwitch

F821

Triggered ceramic-metal spark gap for crowbar protection and energy-transfer circuits. Triggered breakdown provides rapid high-current switching.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

The ITT F821 is a triggered ceramic-metal spark gap for electronic crowbar and energy-transfer applications.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
-
Nominal heater current
-
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

SparkGapPulseSwitch

X-ray radiationInterelectrode capacitances
Max cathode current
100000 A

Triggered spark gap; electrical hold-off, trigger and discharge ratings retained as parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1962 ITT

Published operating points and test conditions from this source.

SECTION 1

SparkGapPulseSwitch

Other

  • Operating range

    6 to 16 kV

  • Static breakdown potential

    19 kV

  • Trigger potential

    15 kV

  • Energy discharge

    2500 J

  • Peak current

    100000 A

  • Delay time

    0.04 us

Characteristic

  • Heater power required

    No